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Install the processor heat sink

Follow instructions in this section to install the processor heat sink. This procedure must be executed by a trained technician.

disconnect all power
The power-control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.
hot surface
Hot surface nearby.

About this task

  • Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.

  • Power off the server and peripheral devices and disconnect the power cords and all external cables. See Power off the server.

  • Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static-sensitive components in their static-protective packages until installation, and handling these devices with an electrostatic-discharge wrist strap or other grounding system.

  • Do not allow the thermal grease on the processor or heat sink to come in contact with anything. Contact with any surface can compromise the thermal grease, rendering it ineffective. Thermal grease can damage components, such as the electrical connectors in the processor socket.


  1. Make preparation for this task.
    1. If there is any old thermal grease on the processor, gently clean the top of the processor using an alcohol cleaning pad. Dispose of the cleaning pad after all of the thermal grease is removed.

      Make sure the alcohol has fully evaporated before applying new thermal grease.

    2. To ensure the best performance, check the manufacturing date on the new heat sink and make sure it does not exceed 2 years. Otherwise, wipe off the existing thermal grease from the new heat sink, and apply new grease on the top of the processor for optimal thermal performance.
    3. Apply the thermal grease on the top of the processor with syringe by forming four uniformly spaced dots, while each dot consists of about 0.1 ml of thermal grease.
      Figure 1. Proper shape of the thermal grease
      Proper shape of the thermal grease
  2. Install the processor heat sink.
    1. Align the heat sink with the guide pins on the system board; then, lower the heat sink down until it is firmly seated.
    2. Fully tighten the four captive screws in the installation sequence shown on the heat-sink label. Tighten the screws until they stop; then, visually inspect to make sure that there is no gap between the screw shoulder beneath the heat sink and the system board. (For reference, the torque required for the captive screws to fully tighten is 1.4-1.6 newton-meters, 12-14 inch-pounds.)
    Figure 2. Installing the processor heat sink
    Installing the heat sink

After this task is completed

Complete the parts replacement. See Complete the parts replacement.

Demo Video

Watch the procedure on YouTube